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Finding the Fourth Proportional to 287,189.01, 396,365.40 and 172,531.49

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Solution

The fourth proportional to 287,189.01, 396,365.40 and 172,531.49 is: 238,120.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,189.01 : 396,365.40 = 172,531.49 : x
  2. Step 2: Convert to fraction form
    287,189.01/396,365.40 = 172,531.49/x
  3. Step 3: Cross multiply
    287,189.01x = 396,365.40 × 172,531.49
  4. Step 4: Simplify right side
    287,189.01x = 68,385,511,064.62
  5. Step 5: Solve for x
    x = 68,385,511,064.62/287,189.01
  6. Step 6: Final answer
    x = 238,120.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.